System for displaying data on a video screen in graphical mode

Details System for displaying data on a video screen in graphical mode System for displaying data on a video screen in graphical mode

1984-02-23

1987-08-04

Brigance, Gerald L.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340802, G09G 116

Patent

active

046849386

ABSTRACT:
A system for visualization on a video screen (6) in a graphical mode in which the visual information to be displayed is defined on the screen by a point by point sweeping, from page memory containing, at a given time, all of the video information to be displayed, and a video display processor (4), connected to a random access memory containing said page memory and to a display control unit (37) adapted to convert the information relative to the image composed from the contents of the memory (5) to screen (6) control signals, characterized in that central processing unit (1) is connected to the video display processor (4) by means of a single bus (12) over which are transmitted, on a time shared basis, the address fields and the data fields (15) and in that it includes in addition a control and interpretation circuit (27) capable, in response to an assignment signal generated by said central processing unit, to interpret the address field as an address field per se or as a control field for the video display processor.

REFERENCES:
patent: 4323896 (1982-04-01), Fielder et al.
patent: 4434488 (1984-02-01), Palmquist et al.
patent: 4435779 (1984-03-01), Mayer et al.
patent: 4503429 (1985-03-01), Schreiber

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